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Re: temperature or day lenght

  • Subject: Re: [iris-photos] temperature or day lenght
  • From: Robt R Pries rpries@sbcglobal.net
  • Date: Fri, 4 Aug 2006 05:21:20 -0700 (PDT)


You have posed many interesting questions.
Unfortunately I do not believe we have definitive
answers. Louisianas will grow and bloom pretty far
south on the USA. But I can not remember if any have
been reported blooming in the southern tip of Florida
where there would be no frost. Some do occur naturally
just slightly farther north in Florida and there they
would usually have very light frost. The English have
had some problems getting them to bloom because they
do not get a really warm spell in summer. I would
guess that you would not have problems flowering them
as long as you have seasons of summer/winter to some
degree and this may be a wet/dry season rather than a
cold warm season. But until you have actually tried I
donít believe anyone will be able to tell you. There
is a separate talk group for Louisianas and several
people from Australia belong and they might have some
answers. Sadly gardening is still not an exact science
and advice is limited in how well it applies to your
area. I would suggest posing these questions to
Louisiana-Iris@yahoogroups.com . 

I would suggest trying Reblooming Tall-bearded Iris.
These plants rebloom for many people spring and fall.
The fall bloom is nor preceded by cold temperatures to
initiate bloom. They seem to be able to bloom just by
growing rapidly. There are nurseries in southern
cailfornia that get relatively little frost and do
very well with the rebloomers.

You asked about crossing with Neomarica. I think this
may be possible but very difficult and would require
many attempts. If I were choosing Iris to try with
Neomarica I would not think of the Louisianas first,
but would try either Iris pseudacorus, or the tropical
crested Irises such as Iris confusa, Iris wattii, Iris
japonica, etc. These last plants actually can not take
freezing temperatures and have gorgeous blooms. 

--- alexisn pardo <orquiven@cantv.net> wrote:

> Hello iris -group 
> Are Louisiana  Iris estimulated to bloom by warm
> temperature or a previous winter or by day lengh or
> both? and is this or these factors a most to make
> them bloom ? Are there varieties that will not
> depend very strictly to these factors to bloom ? Are
> there varieties that have a long period for blooming
> or are they all very seasonal ? Can they be
> hybridiced with Neomaricas that grow and bloom with
> no problem in my very tropical conditions in
> Venezuela?
> Sorry for so many questions. The Louisiana Iris book
> I ordered have not arrive jet , maybe it will answer
> all my questions . 
> Regards, Alexis 
> Alexis J. Pardo Isla
> Tlf. 58 243 2618009
> www.orquiven.com 
>   ----- Original Message ----- 
>   From: Robt R Pries 
>   To: iris-photos@yahoogroups.com 
>   Sent: Wednesday, August 02, 2006 10:11 AM
>   Subject: Re: [iris-photos] Central Iris Database
>   Presently the American Iris Society publishes a
> number
>   of descriptive checklists. But a massive image
> databse
>   of the 70,000 cultivars has yet to be created. 
>   Already two groups have created illustrated
> checklists
>   and it is only a matter of time and energy before
> all
>   Irises will have image databases. Check out the
> Aril
>   Society international. The Dwarf Iris Society is
>   working on an illustrated checklist and so is the
>   Median iris Society. Thes Spuria Society has one
> in
>   print but is very hard to come by since it is
> printed
>   a few copies at a time. Check out the SIGNA
> species
>   database. Jonathon if you would like to work on
> such a
>   project volunteers are always welcome.
>   --- Jonathan <jfew@bigpond.com> wrote:
>   > Once again let me say what a joy it is to belong
> to
>   > this group and to 
>   > see so many breathtaking plants on display in
>   > member's photographs. As 
>   > some of the memembers may recall i inherited
> some of
>   > my late parents 
>   > collection and as they are about to bloom, i was
>   > wondering IF there 
>   > exists a Central Database of Bearded Irises on
> the
>   > Internet, that i 
>   > could log onto and compare my flowers with those
>   > named by other members.
>   > I dont mind how many links i get as long as we
> can
>   > cover the plants i 
>   > have thriving here. Best wishes to all.
>   > Jonathan
>   > 
>   > 
>   > 
>   > 
>   > 

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